Heterogeneous distribution of single-bottle adhesive monomers in the resin-dentin interdiffusion zone
Heterogeneous distribution of single-bottle adhesive monomers in the resin-dentin interdiffusion zone
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DOI：
10.1016/s0109-5641(00)00082-8
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发表时间：
2001-07-01
期刊：
影响因子：
5
通讯作者：
Palaghias, G
中科院分区：
文献类型：
--
作者：
Eliades, G;Vougiouklakis, G;Palaghias, G
目的：探讨单瓶粘接剂在酸蚀牙本质表面上是否会发生单体分离。方法：用单瓶粘接剂One Step、Prime and Bond 2.1、Scotchond 1和Syntac-Sprint处理牙本质表面涂抹层后进行酸蚀处理，并进行显微MIR红外光谱分析。绘制了不同的光谱(相同牙本质表面的酸蚀和预涂减酸蚀)，并与原始粘接剂光谱进行了比较。C=C/C。。用C(芳香族粘合剂)和C=C/C=O(脂肪族粘合剂)峰面积比来评估树脂-牙本质互扩散区最上面2微米处单体相对于原始粘接剂光谱的分离程度。每种粘结剂均使用三个牙本质标本。经单因素方差分析和Newman-Keuls检验，差异有统计学意义(α=0.05)。结果：所有粘结剂在酸蚀牙本质上均表现出单体组分的分离度，平均值为68.7%~81.9%。在研究区域，高分子量疏水单体(即双DMA、双GMA、双GMA加合物)和亲水单体(即BPDMA)占主导地位。PRIME和Bond 2.1表现出最大程度的单体分离。意义：在酸蚀牙本质应用后，单体分布不均匀可能会影响树脂渗透区域内单瓶粘合剂的固化性能，从而影响形成的网络的机械和化学稳定性。(C)2001年牙科材料学会。爱思唯尔科学有限公司出版。版权所有。
Objectives: The purpose of this study was to investigate whether monomer separation occurs in single-bottle adhesives applied on acid-etched dentin surfaces.Methods: Smear-layer covered dentin specimens produced from sound premolars, were acid-etched and analyzed by micro-MIR FTIR spectroscopy, before and after treatment with the single-bottle adhesives One-Step, Prime and Bond 2.1, Scotchbond 1 and Syntac-Sprint. The difference spectra (etched, and primed minus etched of the same dentin surfaces) were plotted and compared with original adhesive spectra. The C=C/C . . .C (aromatic adhesives) and C=C/C=O (aliphatic adhesives) peak area ratios were used to evaluate the extent of monomer separation relative to original adhesive spectra at the uppermost 2 mum of the resin-dentin interdiffusion zone. Three dentin specimens were used for each adhesive. One-way ANOVA and Newman-Keuls tests were performed to assess the statistically significant differences (alpha = 0.05).Results: All the adhesives demonstrated separation of monomer components on etched dentin ranging in mean values from 68.7 to 81.9% relative to reference. High molecular weight hydrophobic (i.e. BisDMA, BisGMA, BisGMA adducts) and hydrophilic monomers (i.e. BPDMA) predominated at the region probed. Prime and Bond 2.1 demonstrated the highest extent of monomer separation.Significance: Heterogeneous monomer distribution following application to etched dentin may affect the curing performance of single-bottle adhesives within the resin infiltrated region and consequently, the mechanical and chemical stability of the network formed. (C) 2001 Academy of Dental Materials. Published by Elsevier Science Ltd. All rights reserved.